Add stale cleanup function (still WIP)

internal/virtualdevice/cleanup.go

@@ -0,0 +1,35 @@
+// Functions for cleaning up stale virtual devices
+
+package virtualdevice
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/holoplot/go-evdev"
+)
+
+func CleanupStaleVirtualDevices() {
+	devices, err := evdev.ListDevicePaths()
+	if err != nil {
+		fmt.Printf("Couldn't list devices while running cleanup: %s\n", err.Error())
+		return
+	}
+
+	for _, devicePath := range devices {
+		if strings.HasPrefix(devicePath.Name, "joyful-joystick") {
+			device, err := evdev.Open(devicePath.Path)
+			if err != nil {
+				fmt.Printf("Failed to open existing joyful device at '%s': %s\n", devicePath.Path, err.Error())
+				continue
+			}
+
+			err = evdev.DestroyDevice(device)
+			if err != nil {
+				fmt.Printf("Failed to destroy existing joyful device '%s' at '%s': %s\n", devicePath.Name, devicePath.Path, err.Error())
+			} else {
+				fmt.Printf("Destroyed stale joyful device '%s'\n", devicePath.Path)
+			}
+		}
+	}
+}